Locking washer



P. 'A. TREPIER. LOCKING WASHER;

APPLICATION FILED MAR. 31 1920.

I Patented Aug. 15, 1922.

TES

PAUL A-IM'E TREPIER, or PA RIS,.FRA 1\TCE.

LOCKING WASHER.

To all whom it may concern:

Be it known that I, PAUL AI E TREPrER, a citizen of theRepublic of France, residing in Paris, France, have invented new and useful Improvements in or Relating to Locking Washers, of which the following is a specification. 0 j

This invention relates to locklng washers for preventing a nut or the like from becoming loose or unscrewed.

An object of the invention is to prov de a powerful flexible spring washer whlchw can be used in a relatively small space, and which will hold two objects in the desired positions under intense vibration.

Another object is to provide a serles of elastic platesin juxtaposed relation and'secured together to form a powerful washer, and in order to be manipulated as a single unit.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawing forming a part of this specification, in which like numerals are employed to designate like parts throughout the same,- r v Fig. 1 is a cross section through the preferred form of my invention. v

Fig. 2 showsa section taken between two of the lates shown in Fig. 1.

In *igs. 1 and 2, the numerals 1, 2, 3, 4, 5 and 6 designate a series of spring or elastic plates in juxtaposed relation one within another, having alined central bores through which extends a tube 7. The outer plates 1 and 2 have beveled faces adjacent 1920. Serial no. 370,311.

Specification of Letters latent. Patented Aug; 15, 1922 Application filed March'31, l

their bores to receive the riveted o rheadedends of the tube? and thus the tube ends will beflush with theouter surface off-the plates.

By the juxtaposition of several spring '1- plates the stresses if the plates are arranged within each other may be added together and the deflections may be added together if they are placed symmetrically in pairs.

The plates formingthe washers are thin,

and there are several of'them inorder to.

obtain both the necessary pressure for P1187. .5

venting unscrewing and suflicient convexity for ensuring contlnuation of thesaid press sure when playtakes place between the parts to be secured, either owing to elastic,

or to permanent deformation.

In use, the washer, or more thanwone, is placed under a nut or bolt head. Upon tightening the nut or or washers are flattened and thus givethe' bo1t,the spring washer appearance, of an ordinary washer. -The nut is thenheavily pressedagainst'the faces of the screw threads and the pressure will contlnue even if the nut becomes slightly loose.

Having thus described invention, EI Y A locking washer comprising a series of, a

conical elastic plates destined to be placed 7 under a nut to prevent the unscrewing .thesame, said plates being en aged one in the other and centered on a seeve having flanges engaging the-beveled faces of the outermost plates. j

.In witness whereof PAUL AIME TREPIER. I

I aflix my signature. 

